A generalized on-line estimation and control of five-axis contouring errors of CNC machine tools

Yang, Jixiang; Altintaş, Yusuf

doi:10.1016/j.ijmachtools.2014.08.004

Cited by 140 publications

(34 citation statements)

References 38 publications

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“…Moreover, high-frequency servo loop functions integrated to CNC systems allow smoother machining operations whilst maintaining good transition from one move to the next, mainly in terms of feedrate. Thereby, it comes as a conclusion that simple interpolators can still be implemented for high-precision machining applications not only for industry but also to current academic research [28].…”

Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

Intelligent CNC Tool Path Optimization for Sculptured Surface Machining Through a Virus-Evolutionary Genetic Algorithm

Fountas¹,

Vaxevanidis²,

Stergiou³

et al. 2015

Materials Forming, Machining and Tribology

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Priorities for manufacturers worldwide include their attempt towards optimizing modern manufacturing systems to satisfy the needs of their customers. Major goal of the proposed study is to present a novel optimization methodology based on Artificial Intelligence using the Virus Theory of Evolution. The methodology implements a Virus-Evolutionary Genetic Algorithm to undertake sculptured surface tool path optimization in terms of geometrical machining error to reflect part quality and machining time to reflect productivity for both 3-and 5-axis sculptured surface machining. The algorithm implements its virus operators to create efficient solution representations, to rabidly reproduce enhanced schemata during the evaluations' loops, and finally come up with the optimum machining parameters based on the available resources and constraints ought to be imposed. Through a fully automated environment, time-consuming activities and repetitive tasks are no more of the CNC programmers' concern since the algorithm handles the CAM system's

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Section: Problem Statement and Research Objectivesmentioning

confidence: 99%

Intelligent CNC Tool Path Optimization for Sculptured Surface Machining Through a Virus-Evolutionary Genetic Algorithm

Fountas¹,

Vaxevanidis²,

Stergiou³

et al. 2015

Materials Forming, Machining and Tribology

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“…The use of curve segments can significantly reduce the nonlinear error directly caused by the motion of translational axes [3]. However, since a nonlinear relationship exists between the position coordinates of the rotation axes and components of tool orientation, the tool will deviate from the plane generated by the initial and final tool orientations during machining and will travel in a curved trajectory instead of the desired straight path, leading to nonlinear error [4][5][6][7]. Therefore, research on the relationship between the motion of rotation axes and nonlinear errors has very important directive to improve machining efficiency and to achieve more accurate motion control of axes in five-axis machining.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Nonlinear Error Caused by Motions of Rotation Axes for Five-Axis Machine Tools with Orthogonal Configuration

Geng

Qiu

2018

Mathematical Problems in Engineering

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Since a nonlinear relationship exists between the position coordinates of the rotation axes and components of the tool orientation, the tool will deviate from the required plane, resulting in nonlinear errors and deterioration of machining accuracy. Few attempts have been made to obtain a general formula and common rules for nonlinear error because of the existence of various kinematic structures of machine tools with orthogonal configuration. This paper analyzes the relationship between the deviation of cutter location points and motion of tool orientations. Five-axis CNC machine tools are divided into two groups according to the configuration of the two rotational joints and the home position. Motions of the tool are regarded as a combination of translation and rotation. A model for error calculation is then built. The maximum deviation of the tool with respect to the reference plane generated by the initial and the final orientation is used to quantify the magnitude of the errors. General formulas are derived and common change rules are analyzed. Finally, machining experiment is conducted to validate the theoretical analysis. The research has important implications on the selection of a particular kinematic configuration that may achieve higher accuracy for a specific machining task.

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“…As we all know, the performance of contouring error compensators degrades when the curvatures of command paths are very big because of the limited bandwidths of the servo drives [13]. Another typical problem is resulted from the static friction torque and other nonlinear disturbance torques, by which the sharp curves of the tracking error are generated [14,15].…”

Section: Introductionmentioning

confidence: 99%

Iterative pre-compensation scheme of tracking error for contouring error reduction

Zhang

Chen

2016

Int J Adv Manuf Technol

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Contouring errors calculated from the tracking errors of the individual servo drives is one of the important factors that affect machining accuracy. Through the precompensation of the tracking errors the contouring error can be reduced. This paper builds the prediction model of the tracking error, based on which iterative pre-compensation scheme is proposed, to achieve the optimum precompensation value without running servo drives repetitively. Simulation and experiment results verify that the tracking error can be predicted accurately by the prediction model and the iterative pre-compensation scheme of the tracking error can reduce the contouring error effectively.

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A generalized on-line estimation and control of five-axis contouring errors of CNC machine tools

Cited by 140 publications

References 38 publications

Intelligent CNC Tool Path Optimization for Sculptured Surface Machining Through a Virus-Evolutionary Genetic Algorithm

Intelligent CNC Tool Path Optimization for Sculptured Surface Machining Through a Virus-Evolutionary Genetic Algorithm

Analysis of Nonlinear Error Caused by Motions of Rotation Axes for Five-Axis Machine Tools with Orthogonal Configuration

Iterative pre-compensation scheme of tracking error for contouring error reduction

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